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Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!

Adapters

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  • $250.00 USD - $250.00 USD
    $250.00 USD
    $250.00 USD - $250.00 USD
    $250.00 USD

    Optec DSI 3.5" Extension Tube Set - 5 Pieces

    OPC-19890

    Rich Simons of Deep Sky Instruments and Optec have jointly developed a new, larger diameter standard spacer for large aperture telescopes. Like th...

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    $250.00 USD - $250.00 USD
    $250.00 USD
    $250.00 USD - $250.00 USD
    $250.00 USD
  • $95.00 USD - $95.00 USD
    $95.00 USD
    $95.00 USD - $95.00 USD
    $95.00 USD

    Optec DSI 3.5"x24tpi(M) to M72x1(M) Takahashi Adapter

    OPC-19917

    Optec-DSI 3.5x24tpi male thread to M72x1mm (male) Takahashi thread. Outside Diameter: 3.82" (97.0mm) Overall Height: 0.74" (18.8mm) Clear Aperture...

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    $95.00 USD - $95.00 USD
    $95.00 USD
    $95.00 USD - $95.00 USD
    $95.00 USD
  • $135.00 USD - $135.00 USD
    $135.00 USD
    $135.00 USD - $135.00 USD
    $135.00 USD

    Optec OPTEC-4300 to DSI 3.5"(F) Adapter

    OPC-19830

    The #19830 OPTEC-4300 to female Optec/DSI 3.5" threaded receiver allows any combination of our DSI 3.5-inch spacers to be easily installed on the c...

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    $135.00 USD - $135.00 USD
    $135.00 USD
    $135.00 USD - $135.00 USD
    $135.00 USD